Life Span
Biennial
Perennial
Type
Tree
Shrubs
Origin
Central United States, Canada
China, Japan, Korea
Types
Two-petal ash, Single-leaf ash, Fragrant ash
Petasites hybridus
Number of Varieties
6510
0
40000
👆🏻
Habitat
Dry areas, Hills, limestone outcrops, Moist woods
Wet lands
USDA Hardiness Zone
4-85-9
0
99
👆🏻
AHS Heat Zone
8-4
9-4
Sunset Zone
2a, 2b, 3a, 3b, 4, 5, 6
2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Habit
Upright/Erect
Clump-Forming
Plant Size
Minimum Height
2,500.00 cm60.00 cm
0
3900
👆🏻
Minimum Width
100.00 cm120.00 cm
0
6350
👆🏻
Plant Color
Flower Color
Green, Purple
Light Yellow, Ivory
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Green, Tan
-
Leaf Color in Spring
Green
Green, Purple, Burgundy
Leaf Color in Summer
Green
Green, Purple
Leaf Color in Fall
Yellow, Light Yellow
Green, Purple
Leaf Color in Winter
-
-
Shape
Leaf Shape
Pinnate
Round
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall
Spring, Summer, Fall
Growing Conditions
Sunlight
Full Sun
Partial shade, Full Shade
Growth Rate
Fast
Fast
Type of Soil
Clay, Loam
Clay, Loam, Sand
The pH of Soil
Neutral, Alkaline
Acidic, Neutral, Alkaline
Soil Drainage
Well drained
Poorly Drained
Bloom Time
Spring
Early Spring, Late Winter
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Wet Site
Where to Plant?
Ground
Ground
How to Plant?
Seedlings, Transplanting
By dividing rhizomes, tubers
Plant Maintenance
Medium
Medium
Watering Plants
Watering Requirements
Average Water Needs
Requires consistently moist soil
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Neutral, Alkaline
Acidic, Neutral, Alkaline
Soil Type
Clay, Loam
Clay, Loam, Sand
Soil Drainage Capacity
Well drained
Poorly Drained
Sun Exposure
Full Sun
Partial shade, Full Shade
Pruning
Remove damaged leaves, Remove dead branches, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
All-Purpose Liquid Fertilizer
All-Purpose Liquid Fertilizer
Pests and Diseases
Red blotch
Red blotch
Plant Tolerance
-
Drought
Flowers
Insignificant
Showy
Flower Petal Number
-
-
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Medium
Bold
Foliage Sheen
Matte
Glossy
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Birds
-
Allergy
-
-
Uses
Aesthetic Uses
-
Ground Cover
Beauty Benefits
-
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Shadow Tree
Air purification
Plant Benefits
Medicinal Uses
-
Asthma, Chronic fatigue
Part of Plant Used
Inner Bark, Seeds
Leaves, Seeds, Stem
Other Uses
Used as a dye, Used for woodware, Wood is used in construction
Used as Ornamental plant
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Shade Trees, Street Trees
Bog Garden, Container, Water Gardens
Botanical Name
FRAXINUS quadrangulata
PETASITES japonicus 'Purpureus'
Common Name
Blue Ash
Giant Butterbur, Japanese Butterbur, Purple Butterbur
In Hindi
Blue Ash plant
Purple Butterbur
In German
Blue Ash Pflanze
Lila Pestwurz
In French
usine Blue Ash
Violet Butterbur
In Spanish
planta de Blue Ash
púrpura petasita
In Greek
φυτό Blue Ash
Purple Butterbur
In Portuguese
planta Blue Ash
roxo Carrapicho
In Polish
Blue Ash roślin
Purpurowy Lepiężnik
In Latin
Blue Ash herba
Purple Butterbur
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
Magnoliophyta
Class
Magnoliopsida
Magnoliopsida
Order
Scrophulariales
Asterales
Family
Oleaceae
Asteraceae
Genus
Fraxinus
Petasites
Clade
Angiosperms, Asterids, Eudicots
Angiosperms, Asterids, Eudicots
Tribe
Oleeae
Senecioneae
Subfamily
-
-
Number of Species
6515
1
27800
👆🏻